# 定义变量
name = "张三"
print(name)

# 不能使用数字开头
# 1name = "李四"

# 不能使用oython内置关键字
# class = "python"

# 严格区分大小写 name == NAME
NAME = "王五"

# 不建议使用中文
标识符 = "aaa"
print(标识符)
username = "赵六"
userName = "朝早"
user_name = "小明"